Title: Indicative fire test. WF Report No: /A. Prepared for: Hoody Speaker Hoods Ltd

Transcription

1 Exova Warringtonfire Holmesfield Road Warrington WA1 2DS United Kingdom T : +44 (0) F : +44 (0) E : warrington@exova.com W: Title: Indicative fire test WF Report No: /A Prepared for: Hoody Speaker Hoods Ltd Link House Knight Rider Court Knight Rider Street Maidstone Kent ME15 6LU Date: 12 th November 2013

2 Page 2 of 16 Indicative Fire Test We have pleasure in enclosing the information obtained from the indicative fire test conducted, on your behalf, on the 9 th August The test results relate to an investigation, which utilised the heating and pressure conditions specified in BS EN : The information is provided for the test sponsor s information only and should not be used to demonstrate performance against any published fire test standard, nor compliance with a regulatory requirement. The test was not conducted under the requirement of UKAS accreditation. The purpose of the investigation was to provide an indication of the behaviour of a section of a timber floor protected on its underside by a plasterboard ceiling incorporating three speakers and associated covers, when subjected on its underside to the heating and pressure conditions specified by BS EN : The test assembly had overall nominal dimensions of 1700 mm wide by 2200 mm long and briefly comprised three sections of softwood timber joist at nominally 600 mm centres. The ends of the joists were closed with a section of the same softwood joist fixed across the ends on both edges. The floor construction was faced on its upper surface with a single layer of nominally 22 mm thick chipboard flooring. The underside of the floor was provided with a direct fixed ceiling formed from two layers of 12.5mm thick Lafarge Firecheck plasterboard. Three speakers with associated covers were fitted into the ceiling. The speakers were referenced A to C for the purpose of the test and were described by the sponsor as follows: Specimen A was referenced Monitor Audio CT165 Ceiling Speaker (Hoody 1). The specimen had a nominal diameter of 265 mm by 160 mm high and was installed within a cut out aperture within the ceiling 211 mm diameter by 114 mm high. Specimen B was referenced Monitor Audio CT180 Ceiling Speaker (Hoody 2). The specimen had a nominal diameter of 335 mm by 180 mm high and was installed within a cut out aperture within the ceiling 247 mm diameter by 121 mm high. Specimen C was referenced Monitor Audio CWT140R Ceiling Speaker (Hoody 5). The specimen had a nominal diameter of 185 mm by 145 mm high and was installed within a cut out aperture within the ceiling 149 mm diameter by 98.6 mm high. All three speakers were fitted with an Acoustic Fireproof Cover, provided by Hoody Speaker Hoods Ltd. The floor assembly was mounted such that it formed the top horizontal face of a 1.5 m by 2.0 m gas fired furnace chamber, the temperature rise of which was controlled to conform with the heating and pressure conditions specified in BS EN : The following information relating to the test is enclosed: Table 1 - Specified and actual furnace temperatures and percentage tolerances Table 2 - Individual and mean temperatures recorded on the unexposed surface of the floor (Thermocouples 20 to 24) Table 3 - Individual temperatures recorded on the unexposed surface of the floor adjacent to joints. (Thermocouples 25 and 26) Table 4 - At three positions mid-height of the air cavity, adjacent to the speaker assemblies (Thermocouples 27 to 29) Graph 1 - Graph showing the specified and actual furnace temperatures

3 Page 3 of 16 Graph 2 - Graph showing the individual and mean temperatures recorded on the unexposed surface of the floor. Observations on the general behaviour of the specimens during the test. Photographs taken before and after the test. The test was discontinued after a period of 90 minutes. We trust that the information obtained from the test will be useful to you. Yours faithfully, Responsible Officer D. Yates Testing Officer Fire Resistance Department Exova Warringtonfire This copy has been produced from a.pdf format electronic file that has been provided by Exova Warringtonfire to the sponsor of the report and must only be reproduced in full. Extracts or abridgements of reports must not be published without permission of Exova Warringtonfire. The pdf copy supplied is the sole authentic version of this document. All pdf versions of this report bear authentic signatures of the responsible Exova Warringtonfire staff.

4 Page 4 of 16 Table 1 Time Specified Actual Furnace Furnace Minutes Temperature Temperature Deg. C Deg. C

5 Page 5 of 16 Table 2 Time T/C T/C T/C T/C T/C Mean Number Number Number Number Number Minutes Temp Deg. C Deg. C Deg. C Deg. C Deg. C Deg. C

6 Page 6 of 16 Table 3 Time T/C T/C Number Number Minutes Deg. C Deg. C

7 Page 7 of 16 Table 4 Time T/C T/C T/C Number Number Number Minutes Deg. C Deg. C Deg. C

8 Page 8 of 16 Graph Temperature - Deg. C Specified Furnace Temperature Deg. C Actual Furnace Temperature Deg. C Time - Minutes

9 Graph 2 WF Test Report Page 9 of 16

10 Page 10 of 16 Test Observations Time All observations are from the unexposed face unless noted otherwise. mins secs The ambient air temperature in the vicinity of the test construction was 21ºC at the start of the test with a maximum variation of +4, -1ºC during the test The test commences Slight smoke release begins from the joints within the timber deck Viewed from the exposed face, the paper face of the plaster board ceiling has begun to burn away. The plastic speaker facing of Specimens A and B appears to have melted and fallen away Viewed from the exposed face, the plastic speaker facing of Specimen C appears to have melted and fallen into the furnace Slight smoke release continues from along the joints within the timber deck. Slight discolouration is evident at the same locations The ceiling board joints appear black in colour and slightly charred. The circular apertures within the ceiling appear blackened and slightly charred also The board joints within the first layer of ceiling board have opened up by approximately mm Viewed from the exposed face, a large section of the first layer of ceiling board has dropped downwards by approximately mm as it begins to detach from the ceiling along the joint Smoke release from the joints within the timber floor has increased slightly. Discolouration has become more evident at the same location Viewed from the exposed face, flames issue from the circular openings within the ceiling. The first layer of the ceiling board has dropped down further along the joint now by approximately 50 mm Smoke release from the joints within the timber deck has increased further Viewed from the exposed face, a large section of the first layer of ceiling board continued to pull away from the ceiling now by approximately mm A large section of the first layer of ceiling board has detached and fallen into the furnace chamber Smoke release has increased further along the timber deck joints A cotton pad is applied at the mid span of a timber deck joint but fails to ignite Viewed from the exposed face, large amounts of flaming issue from the circular apertures within the ceiling.

11 Page 11 of 16 Time mins secs Smoke release from the joints within the timber deck has increased significantly A large section of the second layer of board begins to drop downwards at the approximate centre of the ceiling Smoke release from the ceiling increases significantly and the test is discontinued at the sponsor s request.

12 Page 12 of 16 Test Photographs The exposed face of the ceiling prior to the test. The unexposed face of the ceiling prior to the test.

13 Page 13 of 16 The unexposed face of the ceiling after a test duration of 30 minutes The exposed face of the ceiling after a test duration of 30 minutes

14 Page 14 of 16 The unexposed face of the ceiling after a test duration of 60 minutes The exposed face of the ceiling after a test duration of 60 minutes

15 Page 15 of 16 The unexposed face of the ceiling after a test duration of 90 minutes The exposed face of the ceiling after a test duration of 90 minutes

16 The exposed face of the ceiling immediately after the test WF Test Report Page 16 of 16